<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        function Person(name,age) {
            this.name = name;
            this.age = age;
        }

        Person.prototype.show = function() {
            alert(this.name);
            alert(this.age);
        }

        //worker继承person
        function Worker(name,age,job) {
            Person.call(this,name,age);
            this.job = job;
        }

        Worker.prototype = new Person();
        Worker.prototype.constructor = Worker;

        Worker.prototype.showJob = function() {
            alert(this.job);
        }

        let w = new Worker('blue', 18, '打杂的');
        w.show();
        w.showJob();
    </script>
</body>
</html>